ELFT HÍRADÓ

[Ortvay kollokvium <ortvay AT achilles.elte.hu>]

ELTE Fizika Tanszekcsoport


                             ORTVAY KOLLOKVIUM

                   2004. szeptember 2. , csutortok, 15 orakor
  Az ELTE Pazmany Peter s. 1/A alatti epuleteben a <blink>3.67</blink> 
eloadoban

                               Predrag Cvitanovic
(Chair of the Center for Nonlinear Science School of Physics, Georgia 
Institute of Technology, Atlanta, USA ): 
   "Turbulence: a walk through a repertoire of unstable recurrent patterns" 

Kivonatos ismertetes:

If everything in a turbulent system is in constant flux, how is that humans 
are 
able to distinguish different kinds of turbulence? Hopf's answer was that 
dynamics drives a given spatially extended system through a repertoire of 
unstable patterns; as we watch a given "turbulent" system evolve, every so 
often we catch a glimpse of a familiar pattern. For any finite spatial 
resolution, the system follows approximately for a finite time a pattern 
belonging to a finite aplhabet of admissible patterns, and the long term 
dynamics can be thought of as a walk through the space of such patterns, just 
as chaotic dynamics with a low dimensional attractor can be thought of as a 
succession of nearly periodic (but unstable) motions. I will describe a 
modest 
implementation of Hopf's program on a flutter of a flame front. 

Minden erdeklodot szivesen latunk! Az eloadas elott negyed oraval 
az eloadoban teat szolgalunk fel.
Az eloadas-sorozatrol az interneten az "ortvay-koll.elte.hu" cimen 
talalhato informacio.